The national security adviser departed abruptly after President Trump suggested he might lift some sanctions as an incentive for Tehran to get to the negotiating table.
Warmbier was convicted of trying to steal a propaganda poster while in the North Korea capital and spent 17 months in prison. He died at age 22, days after being returned to the U.S.
In July, a federal appeals court tossed a similar challenge to Trump’s ownership of a luxury hotel near the White House.
“The light is the worst,” Trump said. His administration earlier this month announced it would roll back regulations for increased energy efficiency.
The candidates were largely talking past each other: Castro articulated a real divide, but Biden described his plan largely accurately.